For PDB entry 1DXZ, the side chains of the amino acids within the helical

For PDB entry 1DXZ, the side chains of the amino acids within the helical part of the structure are ________.

all aliphatic

mostly charged

mostly nonpolar

mostly polar

Which amino acid is ~1 turn away from Met 243?

Thr 244

Ile 247

Leu 251

Leu 245

Which of the following statements best describes the N- and C-termini of 1DXZ?

Histidine is the N-terminal amino acid, and the C-terminus is modified to be an amide.

The N-terminus is modified to contain an extra carbonyl group, and the C-terminal amino acid is proline.

Proline is the N-terminal amino acid, and the C-terminus has the typical carboxylate functional group.

Proline is the N-terminal amino acid, and the C-terminus is modified to be an amide.

How was the structure of 1DXZ determined, and where in the cell would this segment of the nicotinic acetylcholine receptor alpha subunit be found?

NMR spectroscopy; in the cytosol

NMR spectroscopy; in the cell membrane

X-Ray diffraction; in the cell membrane

Neutron diffraction; in the cell membrane

Dermcidin, 2YMK, is a barrel-like assembly of 6 a helices that has a _______ and ________ interior.

hydrophobic; fully occluded

hydrophobic; hollow

hydrophilic; fully occluded

hydrophilic; hollow

Entry 1A6M is a protein containing ___ a helices that contain at least 10 amino acids, held together by a hydrogen-bonding framework, where the combined helices form a globular structure with a _______ exterior and a ________ interior.

7; hydrophobic; hydrophilic

6; hydrophilic; hydrophobic

6; hydrophobic; hydrophilic

7; hydrophilic; hydrophobic